Preparation method of buton rock asphalt-modified asphalt mixture

An asphalt mixture and asphalt modification technology, applied in the field of asphalt preparation, can solve the problems of material waste, complex production process, unfavorable small-scale pavement application, etc., and achieve the effect of low raw material, simple preparation method and improved high temperature performance

Inactive Publication Date: 2018-03-30
湖北正康科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although TLA lake asphalt modified asphalt has excellent performance, its production process is complex and requires special processing equipment for modification processing, which is suitable for large-scale application and

Method used

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  • Preparation method of buton rock asphalt-modified asphalt mixture

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of Buton rock asphalt modified asphalt mixture, comprising the following steps:

[0022] (1) Heat 70# base asphalt to 180°C;

[0023] (2) Add Buton rock asphalt to the heated 70# base asphalt in step (1), maintain it at 185°C for 1.5 hours and then stir for 30 minutes to obtain rock asphalt modified asphalt;

[0024] (3) Add gravel to the asphalt-modified asphalt prepared in step (2), and continue shearing at 190°C for 2 hours, so that the gravel is evenly dispersed in the asphalt-modified asphalt;

[0025] (4) Add mineral powder and graphite oxide to the product obtained in step (3) and mix to prepare Buton rock asphalt modified asphalt mixture.

[0026] Preferably, the gravel is limestone.

[0027] Preferably, the addition of Butonite asphalt in the step (2) is 15% of the base asphalt.

[0028] Preferably, the addition of sand powder and graphite oxide in the step (4) is respectively 10% and 5% of the mixture before adding.

Embodiment 2

[0030] A preparation method of Buton rock asphalt modified asphalt mixture, comprising the following steps:

[0031] (1) Heat 70# base asphalt to 175°C;

[0032] (2) Add Buton rock asphalt to the heated 70# base asphalt in step (1), maintain it at 175°C for 1 hour and then stir for 20 minutes to obtain rock asphalt modified asphalt;

[0033] (3) Add gravel to the asphalt-modified asphalt prepared in step (2), and continue shearing at 180°C for 1 hour, so that the gravel is evenly dispersed in the asphalt-modified asphalt;

[0034] (4) Add mineral powder and graphite oxide to the product obtained in step (3) and mix to prepare Buton rock asphalt modified asphalt mixture.

[0035] Preferably, the gravel is basalt.

[0036] Preferably, the addition of Butonite asphalt in the step (2) is 10% of the base asphalt.

[0037] Preferably, the addition of sand powder and graphite oxide in the step (4) is respectively 5% and 3% of the mixture before adding.

Embodiment 3

[0039] A preparation method of Buton rock asphalt modified asphalt mixture, comprising the following steps:

[0040] (1) Heat 90# base asphalt to 190°C;

[0041] (2) Add Buton rock asphalt to the heated 90# base asphalt in step (1), maintain it at 190°C for 2 hours and then stir for 40 minutes to obtain rock asphalt modified asphalt;

[0042] (3) Add gravel to the asphalt-modified asphalt prepared in step (2), and continue shearing at 200°C for 3 hours, so that the gravel is evenly dispersed in the asphalt-modified asphalt;

[0043] (4) Add mineral powder and graphite oxide to the product obtained in step (3) and mix to prepare Buton rock asphalt modified asphalt mixture.

[0044] Preferably, the gravel is diabase.

[0045] Preferably, the addition of Butonite asphalt in the step (2) is 20% of the base asphalt.

[0046] Preferably, the addition of sand powder and graphite oxide in the step (4) is respectively 15% and 8% of the mixture before adding.

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Abstract

The invention provides a preparation method of a buton rock asphalt-modified asphalt mixture. The preparation method comprises the following steps: using buton rock asphalt as a modifying agent, thenadding gravel into buton rock asphalt-modified asphalt for blending and shearing, then adding mineral powder and graphite oxide, and blending with the raw material so as to uniformly disperse the mineral powder and the graphite oxide into the rock asphalt-modified asphalt to obtain the buton rock asphalt-modified asphalt mixture. After matrix asphalt is modified by the buton rock asphalt, the softening point of the asphalt is constantly increased, the penetration is constantly reduced, and the high-temperature performance is improved; meanwhile, the penetration index PI of the modified asphaltis increased, and the temperature sensitivity is improved; the residual penetration ratio after aging is constantly increased, which indicates that the durability of the modified asphalt is improved.In the preparation method, the gravel is directly added into the buton rock asphalt-modified asphalt, and then sand powder and the graphite oxide are added and are uniformly fused with the modified asphalt, so that compaction of the mixture is facilitated, and the overall performance of the mixture is improved; meanwhile, the preparation method is simple, the used raw materials are inexpensive, and the preparation method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of asphalt preparation, and in particular relates to a preparation method of Buton rock asphalt modified asphalt mixture. Background technique [0002] With the large-scale development of highway construction, the demand for modified asphalt for laying roads is increasing, and the modification technology of modified asphalt has been greatly developed. Asphalt mixture using modified asphalt can improve the mechanical properties, high temperature stability and low temperature cracking resistance of pavement asphalt mixture. At present, SBS modified asphalt and TLA lake asphalt modified asphalt are most used on roads. SBS modified asphalt is a modified asphalt formed by blending SBS rubber modifier and base asphalt in a certain proportion. It has excellent high temperature resistance but poor anti-aging performance. The working environment of the road surface changes greatly, and the high temperature and low ...

Claims

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Application Information

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IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/00482C04B2111/0075C04B14/02C04B18/141C04B14/024C04B14/28C04B14/14
Inventor 李亚非沈峻庆贺鹏李小蓉潘超
Owner 湖北正康科技股份有限公司
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